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energized - Full of energy and enthusiasm, feeling ready to accomplish something big

After running 20 miles a day all year, Allen felt energized to do very well in the marathon.

verb

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renounce - To formally declare one is giving up and abandoning a claim, a right, or possession

To start her diet she made a resolution to herself that she would renounce cake for a month.

adjective

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robust - Strong and healthy; vigorous

Despite being stricken with polio as a child, Teddy Roosevelt overcame his sickness and is regarded as one of our most robust presidents.

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mandatory - Compulsory or obligatory, not voluntary – enforced by an authority.

Attendance at the safety meeting is mandatory for all employees.

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persistent - Continuing firmly or stubbornly despite challenges or opposition.

The child was persistent in asking for a puppy until his parents gave in.

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noble - Having high moral qualities such as honor, courage, and generosity.

He announced to the group that he had made the noble decision to donate a large part of his inheritance to charity.

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rigorous - Extremely thorough, exhaustive, or accurate

Before being sent to battle, military members must go through rigorous training in boot camp.

noun

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longevity - The ability to withstand the test of time and remain relevant or functional.

Regular exercise and a balanced diet contribute to a person's longevity.

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unstoppable - So powerful, determined, or effective that it cannot be halted, defeated, or resisted.

With their star player back, the team were unstoppable, and won one game after another.

noun

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marathon - Any long and challenging activity, especially one that tests endurance.

We had a movie marathon and watched all eight Harry Potter films in one weekend — our brains turned to butter around film six.

verb

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reinforce - To make something stronger or more powerful, often by adding additional resources, effort, or structure.

The general ordered additional troops to reinforce the front lines, knowing they were critical to holding the position.

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formidable - Inspiring fear or respect as a result being impressively powerful, intense, or capable.

Though he had big investors for his AI startup, he knew he had to overcome formidable competition against dozens of competing companies.